hebbard



C. C. HEBBARD.

CONCENTRATING TABLE.

APPLICATION FILED MAR. 14. ms.

Patented Dec. 9, 1919.

3 SHEETS-SHEET I- Svwudoz abtozneg C. C. HEBBARQ. CONCENTRATING TABLE. APPLICATION FILED MAR. 14.. I918.

Patented Dec 9, 1919.

3 SHEETS-SHEET 2 L l /[6664M Quezon g C. C. HEBBARD. CONCENTRAHNG TABLE.

APPLICATION HLED' MAR. 14. I918.

Patented Dem 9,1919.

'3 SHEETS-SHEET 3- i 2 m mm m om om aummtoz $6642?! concentrating ance with my nvention, the transverse beams a citizen of the fUnitedj reference being had to the drawings.

very simple means movement simultaneously with the longitudinal" movement which centrates to travel toward the upperends of concentrating tables whereby pieces ofthe baseor floor the lonmtudmal beams of the deck frame.

UNITED s 1Aa u-s PATENT .o ARLE s IfEBBARD, or JOPLIN, MISSOURI.

conCEnreArrire-TABLE.

I To all whom it may c mm 1 Be it known that Creams CQ'IIEBBAPD, States, res ding at Joplin, in the county of Jasp'erand Stateof M;issonri, has invented certain'n'ew and use ful Improvements in Concentrating-Tables, of Whichthe following 18 'a speci'ficatlon,

accompanying One object of this intention is to provide for secur ng a lateral will cause the tenof the concentrating deck, which movement cannot be secured by a merelongiitudinal movement of the table. y 1

A furtherobject is to provide an improved mounting for the resilient supports to secure a lateral component in the 'loiigitudinal movement at the dischargelend of the table.

A. further objeotisl to provide improved means for engaging thetupper and lower ends of the resilient supports with the jside frame and with Another object is to provide improved means Whereby to securethe variable titer-.11

angle of the deck. v

Other objects Willappearinthe course of the following description. My invention illustrated. in the accompanying drawings wherein I a Figure 1 1s a longitudinalelevat on of a able eonstrnctedim accordbeing in section. V V

. Fig.2 is top plan view of the construe tion illustrated in 1'. File. 3 is a rear elevationot' the construction illustrated in Fig.2;

Fig. 4 is a detail fragmentary plan View of ,the bumper and the bumper bar, the

Fig/8 is an elevation of the deck support- Specification of Letters Patent. epgnc'ati nfl lea March 14, 1918.

beams are alike other and are supported from nal beams 10 by means of thevert cally 11 and- 111 the deck any suitable construction, which 1s preferably covered with linoleum, and which is ited to any form of the particular of my invention,- I have not illustrated the same. Supported upon head end of the table Patented Dec. 9, 1919. Serial No. 222,353.

the tulcrun'l member being shown in section;

ling beams onthe opposite side of the deck,

Fig. 9 is a side elevation of one of the resilient deck supports;

F 1g. 10 1s a front new of one of said supports F ig. 11 is a side elevation partly broken away of the unbalanced fly wheelj F ig. 12 is a side elevation partly in section or" the members 47 and 4:9 as used rear- Ward of the head end of the table, and

F ig. 13 is a sectional vieW'of the members at? as used rearward of the head end of the table. 7

Referring to these drawings 10 designates the side beams of the base or floor frame.

These extend parallel to eachother and to the length of the table, as illustrated in .Fi

2. The deck is supported by means of trans ersely extending beams 11 andllflthese and extend parallel to each the longituditendin 'fresilient supporting members ,12

whoseconstruction and arrangement \villbe later stated.

Mountedupon the decksupporting beams 13 which may be of provided with longitudinally extending riffles. Inasmuch as I do not vishto belimdeck and inasmuch as form of deck foi'ms'no part the beams 10 atthe is a base plate let,

which is illustrated asisupp'orted upon lonigitudinal beams 15 andtransverse beams 16, these transverse beams 16 resting upon the :beams 10. i

Attached to the base plate 14 at each end thereof, and extending downward over the beams 15 are the hangers :17 having bearmgs at their lower shaft 18. Pivoted upon the shaft 18 are the upwardly extending arms 19 havingjbean rings at the upper ends for a transverse shaft 20 and miounted on' the shaftQO inward of the arms through which theshaft'QO passes. Mount- ;ed on the shaft an overbalanced pulley or fly Wheel 93. A

1 9 are rods 28 haying heads 21 20 is a loose ends through which passes I a transversely extending plvot or Wheel 22 a nd.

through a passage in the upper driving belt 2 1 is arranged to be shifted to either one of these pulleys.

As illustrated in Fig. 11, the unbalanced pulley or fly wheel 23 is formed with a web 25 through which a bolt 26 passes and by which a weight 27 may be clamped to the pulley to overbalancc it. This weight may be varied in size or thickness so as to vary the power secured from this overbalauced pulley.

Extending from the eyes 21 are rods 28 which are flanged at their ends and are bolted to a bumper block 29 by bolts 30 passing tlurough the flanges. the other faces of the bumper block 29 are rods 31 which their opposite ends have flanged heads 32 bolted to the transverse beam 33 at thehead end of the table.

The rods 31 are provided at their rear ends with flanges through which the bolts 30 pass. The middle of the bumper block 29 provided with a facing 34 of leather or other material held in place by clips This facing made up of a plurality of layers of leather or other material and these layers may be increased or decreased as will be later stated.

Extending upward from the bed plate let is a bumper 36 which is disposed at the middle of the bed plate and extending end of this support is a rod 37 which is screw-threaded at its rear end and surrounding this rod is a coiled compression spring 38 which bears at its forward end against a socket 39 mounted upon the beam 33, this spring at its forward end bearing against a ban wheel 10, which has screw threaded engagement with the rod 37 and constitutes a nut bearing against the compression spring and the rotation of this hand wheel or not acts to project the rod 37 nearer to or retract it farther from the bumper block.

The operation of this portion of my invention is as follows: Assuming that the belt 24: is in engagement with the unbalanced pulley or fly wheel then it will be obvious that as the unbalanced wheel is rotated through the driving belt an oscillatory given to the shaft 20 and movementwill be the supporting arms 19 and to the rods or block and fromthe bars 28 to the bumper bumper block through the arms 31 to the deck. Thus a reciprocating motion will be given to the deck but in order to provide for a sudden jar being given to the deck, I provide the projecting bumper 36 which constitutes a stop against which the bumper block impacts. 1 When the bumper block 29 impacts against the bumper 36, the forward movementof the bumper, of the rods 31 and of the deck is suddenly checked and then as the weighted portion of the unbalanced fly wheel or pulley moves rearward, the bumper block Attached to facing laterally.

29, the rods 31 and the deck are drawn backward against the force of tension of the spring 38 which thus acts as a means for yieldingly limiting the rearward movement of the table. By rotating the hand wheel 10 which constitutes a nut it is possible to increase or decrease the tension of this spring 38 and thus variably control the resistance of the rearward movement of the table and consequently control the extent of this rearward movement. The loose pulley 23 acts as an idler to restrain or stop the movement of the deck.

The means for yieldingly supporting the deck comprises the spring supports 12 pre viously referred to. One of these spring supports is illustrated in Fig. 9, and it will be seen that this spring support comprises a plurality of laminations. Preferably each spring support is made of a plurality of layers of wood held in engagement with each other by metallic bands 11 which embrace the several layers and preferably, as illustrated in Fig. 9, each of these spring supports consists of two layers of wood designated 12 which extend the full length of the spring support and outer laminations decreasing progressively in length, which are designated 43. The spring supports are disposed with the edges of the laminations The lower end of each spring is mounted in'a clamp comprising two members 14: and 15 which are bolted to the side faces of the corresponding beam 10 and which are provided with jaws engaging over the spring support, the beam being notched to partially, engage the support.

These two jaws of the two members are forced toward each other by means of transverse bolts 16 which pass through the lower end ofthe supporting member 12. At its upper end each spring support 12 is engaged between two clamping jaws d7 illustrated in detail in Fig. 5, and held engaged with the upper end of the support 12 by means of the transverse bolt 48.

Attached to the transverse beam 33 are the laterally disposed plates 19 which are bolted to the ends of the beam by means of thebolts 50, as seen in Fig; 5, and these plates 49 overlap the clamping members 17. Each of the plates 49 at its outer margin where it overlaps the clamps or jaws 4:7 is laterally thickened as at 51 and extended upward so as to engage on each side of the deck beam 11 Disposed between these thickened portions 51 of the plates a9 is a rack bar 52 which is guided between the plates. and has vertical movement and is formed at its upper end with a globular head 53 engaging in a recess 5% in the under face of each ofthe supportingmembers 12 disposed forward of the transverse beam 33 and engaged by like clamping plates 17 asillustrated in Fig. 12, and engaging on each side of the clamping members 47 for these supports 12 are the laterally disposed plates 49 which are exactly the same as the plates 49 illustrated in the Figs. 5to 7 except that they are not bolted in the transversely extending beam 33. Each of the plates 49 is laterally thickened as at 51 and extends upward so as to engage on each side of the corresponding deck beam 11 and. each pair of the plates49 guides a rack bar 52 which engages in the end face of the corresponding beam 11. V

One end of the beam 38. is cut away asat 55 and extending through this cut away portion and through the plates 49 on the remainder of the supports 12 is a shaft 56 carrying upon it gear wheels 57whichengage with the several racks 52. This shaft 56 as illustrated in Fig. 1 extends longitudinally the entire length of the machine and at one end carries a gear wheel 58 operated by means of a worm 59 on a worm shaft 60 having .a hand wheel whereby it may be manually turned. The shaft 56 and the several racks 52 and allied parts are dis posed only on one side of the concentrating table, the purpose being to provide means whereby one side of the concentrating table may be raised or lowered relative to the other side to thereby change the lateral angle of inclination of the table. The thickened portions 51 of the plates 49 extend upward on each side of the beams 11 and 11 above the recesses 54 as at 61 so as to guide the beams 11 and 11 as they are raised and hold them in proper position. 7

In order to provide fulcrum for the opposite ends of the beams 11 and the beam 11,

the supporting members 12 at this end (see- Figs. 8 and 18) are engaged by clamping aws 47 One pair of these clamping aws is formed to embrace the end of the beam 33 the remainder of the clamping jaws 47 are formed as illustrated in Fig. 13. All of these plates 49 are connected across their upper ends, and across the upper face of the beam 33 by means of a transverse web having a transversely extending rounded protuberance 62 upon which the beam 11- rocks and the plates 49 are also provided with upward extensions 63 which constitute ears through which a bolt 64 passes, this bolt passing through the beam 11. Thus all of the beams 11 are supported for rocking movement on the fulcrums 62. It will thus be seen that by rotating the shaft 60 that I secure simultaneous adjustment of all of the racks 52 and that I can raise or lower one side of the deck to thereby secure any de sired angle which may be necessary to the deck. It is to be noted that the several jaws 47 and 47 and the several pairs of the jaws 44 and 45 are dis posed at different angles with relation to the longitudinal axis of the table Thus table extend outward from Figs. 1 and 2- those .jaws which are disposed nearest the head end of thetable are arranged at right angles to the length of the table so that the spring supports 12 engage with these jaws in the direction of the axis of the table and that each set of jaws from the head of the tabletoward the tail end is disposed at a greater anglethan the adjacent set of jaws nearer the head end. I

.It willalso be seen from Fig. 1, that the jaws on one side of the table are disposed at the same angle as the jaws on the opposite side, but whereas the jaws on one side of the and rearward, the jaws on the other side of the table extend outward and forward. By arranging the supports in this manner, thehead end of the table will reciprocate in a direction parallel to the longitudinal axis of the base of the table, while the table or deck from its end toward its discharge end will have a lateral component in its movement, the discharge end of the table having a greater lateral component than successive portions of the table toward the head end to thus secure such a lateral and longitudinal movement of the table as will cause the concentrates to travel or move longitudinally and toward the upper edge of the deck, which a purely longitudinal movement of the table or deck will not secure. 7 The extent of the longitudinal reciprocation given to the table will depend upon the number of layers of leather disposed upon the face of the bump ing block 29 and upon the degree of tension in the spring 38.

With this mechanism it will be seen that a purely longitudinal reciprocation is given to the head end of the table and that a longitudinal reciprocation with alateral component is given to the discharge end of the table, the ability of the deck or table to move in this manner being secured by providing the resilient supports 12 for the table set at various anglesto the direction of movement of the deck, as described.

When the belt 24 is shifted upon the idler pulley it is obvious that no reciprocation of the tables will be secured, but when the belt is shifted onto the overbalanced pulley or wheel 22, then the rotation of this wheel will cause the wheel to move forward and rearward in connection with the pivoted arms 19 and this forward and rearward movement will be transmitted tothe cross beam 33 of the deck by means of the rods 28 and 31. When the leather pads on the bumper block 29 strike the face of the bumper 36, the forward movementof the table is stopped abruptly and the table is jarred, without however interrupting in any way the rotation of the overbalanced fly wheel. As the table moves rearward under the action of the overbalanced fly wheel, the spring 38 will be compressed and this compression of the spring will resist the rearward movement of the table to an extent depending upon the tension of the spring. This tension is, of course, regulated by adjusting the hand wheel 40.

It will be seen that I have provided a mechanism for reciprocating the table including a power driven member which is constantly rotatable and which is not stopped or impeded in its rotation in any manner as would be the case were a power driven cam used for reciprocating the table, and furthermore, I secure by the use of an unbalanced fly wheel, a stroke of a power not possible ifa cam were used for urging the table forward.

While I have illustrated a mechanism embodying my invention which I have found to be thoroughly effective in practice, yet it will be understood that the details of this mechanism and arrangement of the several parts may be varied in many ways, without departing from the spirit of the invention, as defined in the appended claims.

Having described my invention, claim is:

1. In a concentrating table, a base frame, longitudinally yieldable pairs of supports disposed at intervals along the base frame, a dock including transversely extending beams, rack bars having rounded heads enwhat I gaging with certain of the transverse beams on one s1de of the deck, said rack bars being operatively supported upon said supports, fulcrum members mounted upon the supports on the opposite side of the table, and a shaft mounted in said last named supports having pinions thereon engaging with said rack bars, and manually operable means carried by certain of said supports for rotating the shaft.

2. In a concentrating table, a base frame, longitudinally yieldable pairs of supports disposed at intervals along the base frame, vertically movable members mounted upon certain of the yieldable supportson one side of the table, fulcrum members mounted upon the supports 011 the opposite side of the table, manually operable means for simultaneously raising or lowering all of said vertically movable members, and a table operatively carried upon said fulcrum members and said vertically movable members.

3. A concentrating table including a base, a deck having transverse supporting beams, longitudinally yieldable supports mounted upon the base, fulcrum members carried upon said supports at one side of the deck and engaging beneath certain of the trans verse beams of the deck and having portions extending on each side of said transverse beams, members mounted upon the longitudinally yieldable supports on the op posite side of the deck and disposed beneath certain of the transverse beams and having portions engaging on each side of the beams,

signature in vertically disposed rack bars mounted in said members and engaging againstthe -un der side of the beams engaged by said members, gear wheels engaging each one of said rack bars, a shaft common to all of said gear wheels, and manually operable means for rotating said shaft.- i

i. A concentrating table including a base, a deck having transversely supporting beams, longitudinally yieldable supports mounted upon the base, members having jaws engaging the upper ends of "the supports at one side of the deck and having fulcrums upon which said beams engage, members including aws embracing the .uppcr ends of the supports at the other side of the deck, said members being vertically recessed, rack bars disposed in said recesses and engaging the under faces of said transverse beams, gear wheels disposed insaid recesses and engaging the rack bars, and means for simultaneously rotating all of said gear wheels, said members at both sides of the deck having upwardly ext-ending portions embracing the transverse beams. I 5. A concentrating table including a deck frame having transverse beams, a base, longitudinally yieldable pairs of supports mounted upon the base and extendingupward therefrom, members having jaws engaging the upper end of each of said supports, the members on one side of the table being formed to provide fulcru-ms. upon which the transverse beams rest and rock, rack bars disposed in said members and having heads on their upper ends supporting the opposite ends of the beams, a longitudinally extending shaft mounted in said members and having means whereby it may a be manually rotated, and pinions carried on said shaft and engaging said rack bars.

6. A concentrating table including a deck frame having transverse beams, a base, longitudinally yieldable pairs of supports mounted upon the base, members operatively connected to the table and comprising two spaced plates, jaws disposed between said plates and clamped thereby and engaging the upper ends of said supporting members, a longitudinal shaft passing through said plates, pinions mounted on the shaft between the plates, and rack bars disposed each between a pair of plates and en gaged by the corresponding pinion and engaging beneath the deck beams, the support engaging jaws being arranged at an increasing angle from the axis of the table from the head "end to the discharge end thereof.

In testimony whereof I hereunto aiiix my the presence of two witnesses. CHARLES C. HEBBARD. Witnesses:

AnoLPrI Sono'nnrmnn, W. F. SoHoENHEnR. 

